Let cmake use absolute locale dirs.

This patch doesn't change the behaviour on Windows.
(Applies patch #2280).

CMakeLists.txt

@@ -151,9 +151,17 @@ if(X11_FOUND)
 	add_definitions(-D_X11)
 endif(X11_FOUND)
 
-add_definitions(-DHAS_RELATIVE_LOCALEDIR=1)
 add_definitions(-DLOCALEDIR=\\\"${LOCALEDIR}\\\")
-set(LOCALE_INSTALL ${DATADIR}/${LOCALEDIR})
+
+# When the path starts with a / on a Unix system it's an absolute path. 
+# This means that on Windows the path used is always relative.
+if(LOCALEDIR MATCHES "^/")
+	add_definitions(-DHAS_RELATIVE_LOCALEDIR=0)
+	set(LOCALE_INSTALL ${LOCALEDIR})
+else(LOCALEDIR MATCHES "^/")
+	add_definitions(-DHAS_RELATIVE_LOCALEDIR=1)
+	set(LOCALE_INSTALL ${DATADIR}/${LOCALEDIR})
+endif(LOCALEDIR MATCHES "^/")
 
 add_definitions(-DFIFODIR=\\\"${FIFO_DIR}\\\")
 

changelog

@@ -31,6 +31,8 @@ Version 1.9.4+svn:
      --smallgui anymore.
    * Reverted hotkey for clearing cache for Mac OS X back to F5. Control-F5
      still works (and is necessary when in windowed mode).
+   * Let cmake use absolute locale dirs when set to an absolute path.
+     (Windows always uses a relative path.) (patch #2280)
 
 Version 1.9.4:
  * AI: